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This technical paper covers the basic theory behind making properly sealed packages with oriented polypropylene (OPP) based films on horizontal flow wrappers and vertical baggers. The relationships between the three factors of the sealing equation (heat, time and pressure) are analyzed and explained in order to provide a basis for real‐world application and problem solving.
Source: https://greenercorp.com/wp-content/uploads/wp_basic_sealing_theory.pdf
